Nissan Versa

 Sedan Service Manual

Ventilation, heater & air conditioner » Heater & air conditioning control system (HAC)
Diagnosis and repair workflow

Workflow

OVERALL SEQUENCE

DETAILED FLOW

1.INTERVIEW CUSTOMER

Interview the customer to obtain as much information as possible about the conditions and environment under which the malfunction occurred.

>> GO TO 2.

2.SYMPTOM CHECK

Verify symptoms.

>> GO TO 3.

3.CHECK FOR DTCS

With CONSULT

1. Turn ignition switch ON.
2. Select "Self Diagnostic Result" mode of "BCM" using CONSULT.
3. Check DTC.

Is any DTC detected?

YES >> GO TO 4.

NO >> GO TO 5.

4.PERFORM DTC DIAGNOSTIC PROCEDURE

Perform the diagnostic procedure for the detected DTC. Refer to BCS "DTC Inspection Priority Chart" or BCS "DTC Inspection Priority Chart".

>> GO TO 7.

5.OPERATION CHECK

Perform the operation check. Refer to HAC "Work Procedure".

>> GO TO 6.

6.SYMPTOM DIAGNOSIS

Check the symptom diagnosis table. Refer to HAC "Symptom Table".

>> GO TO 8.

7.VERIFY REPAIR.

With CONSULT

1. Turn ignition switch ON.
2. Select "Self Diagnostic Result" mode of "BCM" using CONSULT.
3. Check DTC.

Is any DTC detected?

YES >> GO TO 4.

NO >> GO TO 8.

8.PERFORM FINAL OPERATION CHECK

Perform the operation check. Refer to HAC "Work Procedure".

Does it operate normally?

YES >> Inspection End.

NO >> GO TO 2.

Precautions

Manual air conditioning system

Diagnosis and repair workflow

Operation inspection

A/C On signal

Blower fan on signal

A/C Indicator

Front blower motor

Magnet clutch

Insufficient cooling

Insufficient heating

Compressor does not operate

Front air control

Refrigerant pressure sensor

Blower fan resistor

Intake door cable

Mode door cable

Air mix door cable